tomorrow. same time, same channel. an update on the tragic mine explosion in west virginia, the deadliest u.s. mining disaster in 26 years, 25 miners dead, four still missing, screen left, you see the microphones set up for the morning briefing, we expect that within the hour, good morning, everybody, that's where we start, i'm bill hemmer, welcome to "america's newsroom" and welcome back to martha. martha: good morning to you, good morning, everybody, i'm martha maccallum and this massive explosion ripping through what is known as the upper big branch mine and it happened during a shift change yesterday. we're just learning that this mine had six violations , dealing with ventilation issues alone, just this year. that is since january. last year, the mine faced 48 what are called unwarrantable failure orders which are considered quite serious. among the dead in yesterday's blast, and we're learning all of these individual stories now as it comes to light, in one situation, three members of the same family, an uncle and two of his nephews who were all working together were found in close pr
